Triquetral bone
(Redirected from Triquetrous)
Triquetral bone | |
---|---|
File:Triquetrum bone (left hand) 01 palmar view.png | |
File:Triquetrum bone (left hand) 02 dorsal view.png | |
Details | |
Articulations | Lunate bone, Pisiform bone, Hamate bone |
Identifiers | |
Latin | Os triquetrum |
TA98 | Lua error in Module:Wikidata at line 746: attempt to index field 'wikibase' (a nil value). |
TH | {{#property:P1694}} |
TE | {{#property:P1693}} |
FMA | {{#property:P1402}} |
Anatomical terms of bone [[[d:Lua error in Module:Wikidata at line 865: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]] |
The triquetral bone, also known as the triquetrum, triangular bone, or cuneiform bone, is one of the eight carpal bones of the wrist. It is situated on the medial side of the proximal row of the carpus, between the lunate bone and the pisiform bone.
Anatomy[edit | edit source]
The triquetral bone is a three-sided bone that articulates with three other carpal bones: the lunate bone, the pisiform bone, and the hamate bone. It is located in the proximal row of the carpus, which is the row closest to the forearm. The bone has a pyramidal shape and is characterized by its three distinct surfaces.
Surfaces[edit | edit source]
- The superior surface articulates with the ulna via the triangular fibrocartilage complex (TFCC).
- The inferior surface articulates with the hamate bone.
- The lateral surface articulates with the lunate bone.
- The anterior surface articulates with the pisiform bone.
Function[edit | edit source]
The triquetral bone plays a crucial role in the complex movements of the wrist. It contributes to the stability and flexibility of the wrist joint, allowing for a wide range of motion. The bone also serves as an attachment point for various ligaments that support the wrist.
Clinical Significance[edit | edit source]
Injuries to the triquetral bone are relatively uncommon but can occur due to trauma, such as a fall on an outstretched hand. Fractures of the triquetral bone can lead to pain, swelling, and limited motion in the wrist. Diagnosis is typically confirmed through imaging studies such as X-rays or MRI.
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Contributors: Prab R. Tumpati, MD